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Sains Malaysiana 45(12)(2016): 1807–1814 http://dx.doi.org/10.17576/jsm-2016-4512-04 Kesan Penambahan
Surfaktan Tak-Ionik kepada Kompleks Al(III)-Morin dalam Penentuan
Aluminium (III) Akues secara Spektrofotometri (Effect of Addition
of Non-Ionic Surfactant to the A2l(III)-Morin Complex in Spectrophotometry
Determination of Aqueous Aluminum(III)) FAIZ BUKHARI
MOHD
SUAH1*,
MUSA
AHMAD2,3
& LEE YOOK HENG2 1Pusat Pengajian
Sains Kimia, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang,
Malaysia 2Pusat Pengajian
Sains Kimia dan Teknologi Makanan, Fakulti Sains dan Teknologi,
Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor Darul Ehsan,
Malaysia 3Fakulti Sains dan
Teknologi, Universiti Sains Islam Malaysia, Bandar Baru Nilai,
71800 Nilai Negeri Sembilan
Darul Khusus, Malaysia Diserahkan: 1 Februari
2014/Diterima: 8 April 2016 ABSTRAK Dalam kajian ini, kesan surfaktan
tak-ionik terhadap kompleks Al(III)-morin telah dijalankan. Surfaktan
tak-ionik didapati telah meningkatkan bacaan serapan kompleks
Al(III)-morin. Penambahan triton X-100 kepada kompleks Al(III)-morin
telah membolehkan penentuan ion Al(III) dalam kuantiti submikrogram
pada pH4.00 dijalankan. Bacaan serapan maksimum adalah pada 425
nm dengan serapan molar, ε, 9.31 × 103 l.mol-1cm-1.
Graf kalibrasi bagi penentuan ion Al(III) adalah linear daripada
0.03 hingga 2.0 μg mL-1 dengan had pengesanan 0.015 μg
mL-1 telah
diperoleh dalam kajian ini. Sisihan ralat relatif (r.s.d) ialah
2.2% bagi kepekatan Al(III) 1.0 μg mL-1. Kesan penambahan
ion lain terhadap kompleks Al(III)-morin turut dijalankan dan
didapati ion Cu(II), Zn(II) dan Pb(II) memberi gangguan yang lebih
berbanding ion-ion lain. Kata kunci: Interaksi kompleks
logam-surfaktan; morin; penentuan aluminium; surfaktan tak-ionik;
Triton X-100 ABSTRACT The effect of surfactants on
the Al(III)-morin complex have been studied. It was found that
non-ionic surfactant noticeably enhances the absorbance of the
Al(III)-morin complex. Determination of submicrogram quantities
of Al(III) ion at pH4.00 was made possible by the addition of
triton X-100. Maximum absorption was obtained at wavelength of
425 nm, with the calculated molar absorptivity, ε, of 9.31
× 103 l.mol-1.cm-1.
A linear calibration curve of 0.03 to 2.0 μg mL-1 with
the detection limit of 0.015 μg mL-1 was attained for determination
of Al(III) ion. The calculated relative standard deviation (r.s.d)
was 2.2% for Al(III) ion quantified at 1.0 μg mL-1.
The influence of foreign ions towards the Al(III)-morin complex
responses have been carried out too, with Cu(II), Zn(II) and Pb(III)
were found to be the main interferences. Keywords: Determination of aluminium; metal complex-surfactant interaction;
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Analyst 112: 1387- 1389. *Pengarang untuk surat-menyurat; email: fsuah@usm.my
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